Reformat travis.yml
Reformat travis.yml

akalipetis/raven-python,akalipetis/raven-python,getsentry/raven-python,johansteffner/raven-python,johansteffner/raven-python,getsentry/raven-python,getsentry/raven-python,johansteffner/raven-python,akalipetis/raven-python